Electrically-controlled secondary clock.



S. P. THRASHER.

BLEGTBIOALLY CONTROLLED SECONDARY CLOCK.

APPLICATION FILED HAJLZO, 1908.

Patented Dec. 29, 1908.

3 SHEETS-SHEET 1.

S. P. THRASHER. ELEGTRIGALLY CONTROLLED SECONDARY CLOCK.

APPLICATION FILED MAR. 20, 1908. 908,428. Patented Dec.29, 1908 3 SHEETS-SHEET 2.

Invader; Jamaal BT/uzzsha;

IIIIIIIIIIIIIIII 1111 III S. P. THRASHER. ELEGTRIOALLY CONTROLLED SEQONDARY OLOGK.

' APPLICATION FILED MAR. 20, 1908. 908,428. Patented Dec. 29, 1908.

3 SHEETS-SHEET 3.

III/I Ill/I I/IIJ/Z III/ll ll/ //J Ira/621107: Jar/tad Thrasher: .45 Li UNITED STATES PATENT OFFICE. sAMunL POWERS THRASHER; or nimble), conNEcTIoUr-Assmnon TO THE rnnisnnn ctocK COMPANY, OF MANCHESTER, oonnncrrcn'r, A eonronarron. I

i V nLncrmeaLLY-oon'rnounn snconnanv'cneerr.

.170 allw i ay com i ma ses; ci ize b theUm'td stttes't A er a, res ng a Ha tf rd in he county f H tf a i ta e b conne ts ha e n e ne set Im're ements Electrically-Controlled Secondhry Clocks, of whi t e f es s pe fi ien- Thi nve elates ta mp em n s in clock mechanisms. r a

Primarily it has for its object to provide an electrical mechanism that is adapted to be controlled by means of a master clock which is in circuit therewith, theelectrical devices or mechanisms in turn serving as actuating means. to operate gravity devices for propelling or driving the clock or timing mechanisms proper.

The present invention is an improvement upon t e constructions shown in my priorapplications for Letters Patent of the United States filed on September 4;, 19.06 under Se- 1 rial Nos. 333,166 and 333,167, respectively,

wherein I have fully shown, descr bed, claimed-the, specific construction of the timeindicating reversible cards, and the means of mounting and for reversing the samein a stepby-st ep manner.

The invention herein referred to, and which will be described in detail in the specification and particularly covered in theclaims,

- relates to an electro-mechanically o crating means for driving and controlling t e clock devices.

mechanisms proper from a master clock.

In the drawings forming a part of this a plication,Figure 1 is a front elevation of t e invention showing the operative connecting meansv between the electro-magnet, the camshaft, and card-shaft. Fig. 2 is an end elevation of Fig. 1 with one of the side plates removed from the frame of the clock showing the link connection between the armature of the electro magnet and the gravity-actuating- Fig. 3 is a detailed side elevation showing the ten-minute cam construction and the gravity or weight-operating devices connected thereto for moving the corresponding minute cards. Fig. 4 is a side elevation showing, 'in detail, the hour cam and the weight-driving mechanismconnected thereto Referrin to the drawings in'detail, a. and b designate t e side plates of the clock frame containing the clock mechanism, and c and d the. top and bottom baserplates of the frame;

Specification time. Patent;- erv fi i mu h 2 1908- t a 42am 7 will rotate the s and p to draw the lever '20 downward and BatentQd Doc. as, loos.

"normed-9 the Willem c is, eleetrc t-desig ted s ewhel y the let er m n ,1 1. 9- P Of this i en io as h same s s own; assists, d cla med in. y

si es of the b 001; k are thearm or link pieces at and o, and connected with these link pieces are the links 1) and g for actuating the gravity-operating devices whereb the cam-shaft and cardhaft are respective y rotated. The arm n is rigid with the shaft 9 and is secured to. the block by rivets or other analogous devices, while the arm or link g is pivotally a shoulder 15 of the block 1c] The cam-shaft is designated bythe letter 1 an he'ca d aft by the letter 6- Mounted -on th e cam shaft r are the toothed wheels. t,

a d ihe he being Pr d d with 60 teeth re, resenting minutes, and t ere? fore 'terme minut'eewheel, the wheel it with 6 teeth (which may be termed the. tellminute wheel) and the wheel '0 with only one tooth and is termed the hour wheeler Gem.

' Referring now to the means for minute-wheel twhich as. aforesaid contains 69 teeth: Each tooth represents one inute connected t'o'the' block I; at 7: andunderlies.

of time and the link 2 is pivotaHy connected to the lever to at the point at. The. lever w is pivotally mounted on the rod 20 at the point y and 1ts free end is provided with a Wei 't z. The lever to is further provided wit a pawl 2 which is pivoted to this lever at 3 and is so made as to swing toward the minute wheel t by thereof.

5 designates a pawl for preventing the. reverse movement of the minute-wheel, t that is pivoted to the frame at 6 and has, a pin 7 for'engaging the teeth. When the electromagnet e is ener ized, the armature f thereof 9 and cause the n elevate the weight 2; and when the electro ma et is denirgi'zed, or the circuit is bro )1 with the master clock, the weight .2, in. a reverse direction, will; elevate reason of the over-weightedend 4 or. reverse rotation.

the awl 2 and cause the wheelt'tobe ro-l tated or.v advanced a distance or are of one tooth, which represents one minute of time.

,At the same'instant,.the pin 7' on the pawl will drop onto the-wheel t back of a tooth,

thus looking thewheel-against any backward The link g, which is attached to the pivotal arm 0, will simultaneously, with the' movement of the minute-wheel't, operate the lever 8 that is pivotally mounted ,onthe fixed card shaft 8.. This lever is connected to the link q at the point 10 and carries on thearm 11 thereof the weight 12. The. lever 8 is also provided with a pawl 13 and-a pin 14; which .are for the purpose of that ispivoted to the clock frame by means oi-a bracket 16, at the point 17. l'ivotally mounted on the latch 15 is a-gravity pawl 18 at the point.19, which is for the purpose of engaging the shoulders'20 of the card. actuating isksand for preventing backward rotation thereof, while the'latch 15 is for the tatably hung between the I j ment of the disk, the gravity paw purpose of engaging the pins 21 on the cardoperating (llSKS 21 that carry the minute cards 22, and locking the disks againstforward rotation.

When the rotary magnet e is energized the weight 12 is elevated causing the arm-23' of the lever to rise. This arm brings the pin M against the curved surface 24 of the latch 15 disengaging the same from oneof the pins 21 which then ermits the awl-lever 18 to trail over the e go of the dis 21 and engagethe shoulder 20 of the card-actuating disks that carry the minute cards 22, that are ro arms v22 as fully described in my prior application. At the same time, that iswhen the magnet e is denergized, the awl 13 will engage the shoulder 20 of the dis 21 and rotate the same in the direction of the arrow 25 whereby a new minute card will be brought into view. The. pins21, it will be observed, serve to transmit the rotary movements of the disk 21 to the it will be noticed that the position of the lever 8, shown in Fig. 2, is such that the pawl 13 engages the shoulder 20 whereby the greatest leverage is exerted by the weight 12 on the card-disks, and is a gradually de-' creasing leverage, as the weight 12 falls: At the same time, or during the rotar move- 18 will trail over the edge of the disk 21 and drop into the succeeding notch preventing a backward rotation of the disk and at the same time the latch 15 will drop over one of the sins 21 thus holding the disk locked in both' irections, that is against further rotation forward and against any tendency to rotate in a backward direction.

Simultaneousl with the movement of the minute-wheel t t e wheel a is turned forward in the direction of the arrow 26, and this cam raising the latch 15,;

' mounted: on an .poles of which are oilsetifmmi the. of the magnet, an

eoaaas 4 is provided, as shownin 3, with six teeth designated t 27, so that when the minute-'- wheel has moved throu h ten minutes of time the pin 28 on 'the ever 29 will drop from -one'of'the teeth-27 to thebase of the succeeding tooth, operation causes the link to the lever 29) to actuate the lever 32 whereby the disk 33 is rotatedthrough a sixth of a revolution, causing one of 'the cards thereon designated-at 30. "lhls 31 (whichis pivoted a to display the succeeding numeral of the tens place; that is, if the prev1ouscard,indicated 29. minutes for example, the next card would be moved to indicate taneously .with the movements of the nunute-wheel t and the ten-minute'w'heel a, the' cam '41 (which is secured to it'he shaft 1',)' is moved forward in the direction indicatedby the arrowfii one sixtieth of a revolution, and at the ex iration of the hour, the pin 35 on the ivoted ever 36 will fall from the point 37 to 30 minutes: Srmul- I the oint 38 by reason of the weight 39, and i the 'nk connection 40, the vs'reight 39 being arm of the lever 4:1,which lever rotates the disk on which are mounted the hour-cards through one-twelfth of a revo-" ilution in the same manner as that already described in connection with 1* ig. 2.,

The pawl, ratchet, and weight mechanism for moving the ten-minute and hour cards are operated from the links 31' and 40 in the same manner as that already described in connection with the minutecardsqwhich-is clearly shown in Fig.2.

The link 0 is side of the block c ledge portion 7a, so

and below the shoulder or that as the weight 12 ivotally connected to one fallsto drive the clock train, the link g will gradually lift the link 0 into engagementwlth the overhangin shoulder or ledge 76 on the block 76; and w en this engagement occurs,

the circuit is again'closed from'the master 4 again re eated.

What claim, 'is:- I I 1. in combination, an electro-magnet, the axial line armature therefor having fan-shaped end portions normally maintained adjacent the poles, anarmature-shaft, a block mounted thereon,- a clock train, and link connections extending between the blockandtheclock-trainfi of 2. In combination, a card-shaft, card a'ctuating disks mounted on the shaft, means for rotating the disks including an electromagnet, said magnet being rovided with ,clock, causing another energization of the" magnet e where by-the cycle oi: operations are oppositely arranged oil set po e-pieces, a rotary armature, and link connectlons extend ing between the armature and the diskrotating means, as described..

3. In a time-measuring instrument, a camshaft, a minute wheel, a ten-minute and an hour-cam mounted thereon, a card-shaft,

' card-actuating V disks mounted on the card necting means hetween the lever and magnet,

' shaft, and means-for the card-disks as described.

from the minute-wheel, ten-minute and -hour:cams respectively, said means including SAMUE" POWERS THRASHER' 5 a weighted lever, a pm thereon for unlocking Witnesses: r the dISkS tovpermit rotary movement, a 1-0 SAMUEL C; KORE,

" tary magnet for actuating the lever; and con-v PHILEMON R. DAY. 

